// 滚动图片构造函数
function ScrollPic(scrollContId, arrLeftId, arrRightId, dotListId, listType) {

	this.scrollContId = scrollContId; // 内容容器ID
	this.arrLeftId = arrLeftId; // 左箭头ID
	this.arrRightId = arrRightId; // 右箭头ID
	this.dotListId = dotListId; // 点列表ID
	this.listType = listType; // 列表类型

	this.dotClassName = "dotItem";// 点className
	this.dotOnClassName = "dotItemOn";// 当前点className
	this.dotObjArr = [];
	this.listEvent = "onclick";
	this.circularly = true; // 循环滚动（无缝循环）

	this.pageWidth = 0; // 翻页宽度
	this.frameWidth = 0; // 显示框宽度
	this.speed = 10; // 移动速度(单位毫秒，越小越快)
	this.space = 10; // 每次移动像素(单位px，越大越快)
	this.scrollWidth = 5; // 横向滚动宽度

	this.upright = false; // 垂直的滚动

	this.pageIndex = 0;

	this.autoPlay = true;
	this.autoPlayTime = 3; // 秒

	this._autoTimeObj;
	this._scrollTimeObj;
	this._state = "ready"; // ready | floating | stoping

	this.stripDiv = document.createElement("DIV");

	this.lDiv01 = document.createElement("DIV");
	this.lDiv02 = document.createElement("DIV");
};
ScrollPic.prototype = {
	version : "1.41",
	author : "mengjia",
	pageLength : 0,
	touch : true,
	initialize : function() { // 初始化
		var thisTemp = this;
		if (!this.scrollContId) {
			throw new Error("必须指定scrollContId.");
			return;
		};
		this.scDiv = this.$(this.scrollContId);
		if (!this.scDiv) {
			throw new Error("scrollContId不是正确的对象.(scrollContId = \""
					+ this.scrollContId + "\")");
			return;
		};

		this.scDiv.style[this.upright ? 'height' : 'width'] = this.frameWidth
				+ "px";
		this.scDiv.style.overflow = "hidden";

		// HTML
		this.lDiv01.innerHTML = this.scDiv.innerHTML;
		this.scDiv.innerHTML = "";
		this.scDiv.appendChild(this.stripDiv);
		this.stripDiv.appendChild(this.lDiv01);
		if (this.circularly) {// 无缝循环
			this.stripDiv.appendChild(this.lDiv02);
			this.lDiv02.innerHTML = this.lDiv01.innerHTML
		};

		this.stripDiv.style.overflow = "hidden";
		this.stripDiv.style.zoom = "1";
		this.stripDiv.style[this.upright ? 'height' : 'width'] = "32766px";

		if (!this.upright) {
			this.lDiv01.style.cssFloat = "left";
			this.lDiv01.style.styleFloat = "left";
			this.lDiv01.style.overflow = "hidden";
		};
		this.lDiv01.style.zoom = "1";
		if (this.circularly && !this.upright) { // 无缝循环设置CSS
			this.lDiv02.style.cssFloat = "left";
			this.lDiv02.style.styleFloat = "left";
			this.lDiv02.style.overflow = "hidden";
		};
		this.lDiv02.style.zoom = "1";

		this.addEvent(this.scDiv, "mouseover", function() {
					thisTemp.stop()
				});
		this.addEvent(this.scDiv, "mouseout", function() {
					thisTemp.play()
				});

		// Arrowhead event
		// left
		if (this.arrLeftId) {
			this.alObj = this.$(this.arrLeftId);
			if (this.alObj) {
				this.addEvent(this.alObj, "mousedown", function() {
							thisTemp.rightMouseDown()
						});
				this.addEvent(this.alObj, "mouseup", function() {
							thisTemp.rightEnd()
						});
				this.addEvent(this.alObj, "mouseout", function() {
							thisTemp.rightEnd()
						});
			};
		};
		// right
		if (this.arrRightId) {
			this.arObj = this.$(this.arrRightId);
			if (this.arObj) {
				this.addEvent(this.arObj, "mousedown", function() {
							thisTemp.leftMouseDown()
						});
				this.addEvent(this.arObj, "mouseup", function() {
							thisTemp.leftEnd()
						});
				this.addEvent(this.arObj, "mouseout", function() {
							thisTemp.leftEnd()
						});
			};
		};

		var pages = Math.ceil(this.lDiv01[this.upright
				? 'offsetHeight'
				: 'offsetWidth']
				/ this.frameWidth), i, tempObj;
		this.pageLength = pages;
		// dot
		if (this.dotListId) {
			this.dotListObj = this.$(this.dotListId);
			this.dotListObj.innerHTML = "";
			if (this.dotListObj) {

				for (i = 0; i < pages; i++) {
					tempObj = document.createElement("span");
					this.dotListObj.appendChild(tempObj);
					this.dotObjArr.push(tempObj);

					if (i == this.pageIndex) {
						tempObj.className = this.dotOnClassName;
					} else {
						tempObj.className = this.dotClassName;
					};
					if (this.listType == 'number') {
						tempObj.innerHTML = i + 1;
					} else if (typeof(this.listType) == 'string') {
						tempObj.innerHTML = this.listType;
					} else {
						tempObj.innerHTML = '';
					};
					tempObj.title = "第" + (i + 1) + "页";
					tempObj.num = i;
					tempObj[this.listEvent] = function() {
						thisTemp.pageTo(this.num)
					};
				};
			};
		};
		this.scDiv[this.upright ? 'scrollTop' : 'scrollLeft'] = 0;
		// autoPlay
		if (this.autoPlay) {
			this.play()
		};

		this._scroll = this.upright ? 'scrollTop' : 'scrollLeft';
		this._sWidth = this.upright ? 'scrollHeight' : 'scrollWidth';

		if (typeof(this.onpagechange) === 'function') {
			this.onpagechange();
		};

		this.iPad();
	},
	leftMouseDown : function() {
		if (this._state != "ready") {
			return
		};
		var thisTemp = this;
		this._state = "floating";
		clearInterval(this._scrollTimeObj);
		this.moveLeft();
		this._scrollTimeObj = setInterval(function() {
					thisTemp.moveLeft()
				}, this.speed);
	},
	rightMouseDown : function() {
		if (this._state != "ready") {
			return
		};
		var thisTemp = this;
		this._state = "floating";
		clearInterval(this._scrollTimeObj);
		this.moveRight();
		this._scrollTimeObj = setInterval(function() {
					thisTemp.moveRight()
				}, this.speed);
	},
	moveLeft : function() {
		if (this.circularly) { // 无缝循环
			if (this.scDiv[this._scroll] + this.space >= this.lDiv01[this._sWidth]) {
				this.scDiv[this._scroll] = this.scDiv[this._scroll]
						+ this.space - this.lDiv01[this._sWidth];
			} else {
				this.scDiv[this._scroll] += this.space;
			};
		} else {
			if (this.scDiv[this._scroll] + this.space >= this.lDiv01[this._sWidth]
					- this.frameWidth) {
				this.scDiv[this._scroll] = this.lDiv01[this._sWidth]
						- this.frameWidth;
				// 停
				this.leftEnd();
			} else {
				this.scDiv[this._scroll] += this.space;
			};
		};
		this.accountPageIndex();
	},
	moveRight : function() {
		if (this.circularly) { // 无缝循环
			if (this.scDiv[this._scroll] - this.space <= 0) {

				this.scDiv[this._scroll] = this.lDiv01[this._sWidth]
						+ this.scDiv[this._scroll] - this.space;
			} else {
				this.scDiv[this._scroll] -= this.space;
			};
		} else {
			if (this.scDiv[this._scroll] - this.space <= 0) {
				this.scDiv[this._scroll] = 0;
				// 停
				this.rightEnd();
			} else {
				this.scDiv[this._scroll] -= this.space;
			};
		};
		this.accountPageIndex();
	},
	leftEnd : function() {
		if (this._state != "floating" && this._state != 'touch') {
			return
		};
		this._state = "stoping";
		clearInterval(this._scrollTimeObj);

		var fill = this.pageWidth - this.scDiv[this._scroll] % this.pageWidth;
		this.move(fill);
	},
	rightEnd : function() {
		if (this._state != "floating" && this._state != 'touch') {
			return
		};
		this._state = "stoping";
		clearInterval(this._scrollTimeObj);

		var fill = -this.scDiv[this._scroll] % this.pageWidth;

		this.move(fill);
	},
	move : function(num, quick) {
		var thisTemp = this;
		var thisMove = num / 5;
		var theEnd = false;
		if (!quick) {
			if (thisMove > this.space) {
				thisMove = this.space
			};
			if (thisMove < -this.space) {
				thisMove = -this.space
			};
		};

		if (Math.abs(thisMove) < 1 && thisMove != 0) {
			thisMove = thisMove >= 0 ? 1 : -1;
		} else {
			thisMove = Math.round(thisMove);
		};

		var temp = this.scDiv[this._scroll] + thisMove;

		if (thisMove > 0) {
			if (this.circularly) { // 无缝循环
				if (this.scDiv[this._scroll] + thisMove >= this.lDiv01[this._sWidth]) {
					this.scDiv[this._scroll] = this.scDiv[this._scroll]
							+ thisMove - this.lDiv01[this._sWidth];
				} else {
					this.scDiv[this._scroll] += thisMove;
				};
			} else {
				if (this.scDiv[this._scroll] + thisMove >= this.lDiv01[this._sWidth]
						- this.frameWidth) {
					this.scDiv[this._scroll] = this.lDiv01[this._sWidth]
							- this.frameWidth;
					this._state = "ready";
					theEnd = true;
					// return;
				} else {
					this.scDiv[this._scroll] += thisMove;
				};
			};
		} else {
			if (this.circularly) { // 无缝循环
				if (this.scDiv[this._scroll] + thisMove < 0) {
					this.scDiv[this._scroll] = this.lDiv01[this._sWidth]
							+ this.scDiv[this._scroll] + thisMove;
				} else {
					this.scDiv[this._scroll] += thisMove;
				};
			} else {
				if (this.scDiv[this._scroll] - thisMove < 0) {
					this.scDiv[this._scroll] = 0;
					this._state = "ready";
					theEnd = true;
					// return;
				} else {
					this.scDiv[this._scroll] += thisMove;
				};
			};
		};

		if (typeof(this.onpagechange) === 'function') {
			this.onpagechange();
		};

		if (theEnd) {
			return;
		};

		num -= thisMove;
		if (Math.abs(num) == 0) {
			this._state = "ready";
			if (this.autoPlay) {
				this.play()
			};
			this.accountPageIndex();
			return;
		} else {
			this.accountPageIndex();
			this._scrollTimeObj = setTimeout(function() {
						thisTemp.move(num, quick)
					}, this.speed)
		};

	},
	pre : function() {
		if (this._state != "ready") {
			return
		};
		this._state = "stoping";
		this.pageTo(this.pageIndex - 1);
	},
	next : function(reStar) {
		if (this._state != "ready") {
			return
		};
		this._state = "stoping";
		if (this.circularly) {
			this.pageTo(this.pageIndex + 1);
		} else {
			if (this.scDiv[this._scroll] >= this.lDiv01[this._sWidth]
					- this.frameWidth) {
				this._state = "ready";
				if (reStar) {
					this.pageTo(0)
				};
			} else {
				this.pageTo(this.pageIndex + 1);
			};
		};
	},
	play : function() {
		var thisTemp = this;
		if (!this.autoPlay) {
			return
		};
		clearInterval(this._autoTimeObj);
		this._autoTimeObj = setInterval(function() {
					thisTemp.next(true)
				}, this.autoPlayTime * 1000);
	},
	stop : function() {
		clearInterval(this._autoTimeObj);
	},
	pageTo : function(num) {
		if (this.pageIndex == num) {
			return
		};
		if (num < 0) {
			num = this.pageLength - 1
		};
		clearTimeout(this._scrollTimeObj);
		this._state = "stoping";
		var fill = num * this.frameWidth - this.scDiv[this._scroll];
		this.move(fill, true);
	},
	accountPageIndex : function() {
		var pageIndex = Math.floor(this.scDiv[this._scroll] / this.frameWidth);
		if (pageIndex == this.pageIndex) {
			return
		};
		this.pageIndex = pageIndex;

		if (this.pageIndex > Math.floor(this.lDiv01[this.upright
				? 'offsetHeight'
				: 'offsetWidth']
				/ this.frameWidth)) {
			this.pageIndex = 0
		};
		if (typeof(this.onnowpage) === 'function') {
			this.onnowpage(this.pageIndex);
		}
		var i;
		// alert(this.pageIndex);
		for (i = 0; i < this.dotObjArr.length; i++) {
			if (i == this.pageIndex) {

				this.dotObjArr[i].className = this.dotOnClassName;
			} else {
				this.dotObjArr[i].className = this.dotClassName;
			};
		};

		if (typeof(this.onpagechange) === 'function') {
			this.onpagechange();
		};
	},

	iPadX : 0,
	iPadLastX : 0,
	iPadStatus : 'ok',
	iPad : function() {
		if (typeof(window.ontouchstart) === 'undefined') { // 不支持触屏
			return;
		};
		if (!this.touch) {
			return
		};

		var tempThis = this;
		this.addEvent(this.scDiv, 'touchstart', function(e) {
					tempThis._touchstart(e)
				});
		this.addEvent(this.scDiv, 'touchmove', function(e) {
					tempThis._touchmove(e)
				});
		this.addEvent(this.scDiv, 'touchend', function(e) {
					tempThis._touchend(e)
				});
	},
	_touchstart : function(e) {
		// if(this._state != "ready"){return};
		// this._state = 'touch';
		this.stop();
		this.iPadX = e.touches[0].pageX;
		this.iPadScrollX = window.pageXOffset;
		this.iPadScrollY = window.pageYOffset; // 用于判断页面是否滚动
		this.scDivScrollLeft = this.scDiv[this._scroll];
	},
	_touchmove : function(e) {
		if (e.touches.length > 1) { // 多点触摸
			this.iPadStatus = 'ok';
			return;
		};
		this.iPadLastX = e.touches[0].pageX;
		var cX = this.iPadX - this.iPadLastX;
		if (this.iPadStatus == 'ok') {
			if (this.iPadScrollY == window.pageYOffset
					&& this.iPadScrollX == window.pageXOffset
					&& Math.abs(cX) > this.scrollWidth) { // 横向触摸
				this.iPadStatus = 'touch';
			} else {
				return;
			};
		};
		this._state = 'touch';
		var scrollNum = this.scDivScrollLeft + cX;

		if (scrollNum >= this.lDiv01[this._sWidth]) {
			scrollNum = scrollNum - this.lDiv01[this._sWidth];
		};
		if (scrollNum < 0) {
			scrollNum = scrollNum + this.lDiv01[this._sWidth];
		};
		this.scDiv[this._scroll] = scrollNum;
		e.preventDefault();
	},
	_touchend : function(e) {
		if (this.iPadStatus != 'touch') {
			return
		};
		this.iPadStatus = 'ok';
		// this._state = 'ready';
		var cX = this.iPadX - this.iPadLastX;
		if (cX < 0) {
			this.rightEnd();
		} else {
			this.leftEnd();
		};
		this.play();
	},
	$ : function(objName) {
		if (document.getElementById) {
			return eval('document.getElementById("' + objName + '")')
		} else {
			return eval('document.all.' + objName)
		}
	},
	isIE : navigator.appVersion.indexOf("MSIE") != -1 ? true : false,

	// Event
	addEvent : function(obj, eventType, func) {
		if (obj.attachEvent) {
			obj.attachEvent("on" + eventType, func);
		} else {
			obj.addEventListener(eventType, func, false)
		}
	},
	delEvent : function(obj, eventType, func) {
		if (obj.detachEvent) {
			obj.detachEvent("on" + eventType, func)
		} else {
			obj.removeEventListener(eventType, func, false)
		}
	},
	// Cookie
	readCookie : function(l) {
		var i = "", I = l + "=";
		if (document.cookie.length > 0) {
			var offset = document.cookie.indexOf(I);
			if (offset != -1) {
				offset += I.length;
				var end = document.cookie.indexOf(";", offset);
				if (end == -1)
					end = document.cookie.length;
				i = unescape(document.cookie.substring(offset, end))
			}
		};
		return i
	},

	writeCookie : function(O, o, l, I) {
		var i = "", c = "";
		if (l != null) {
			i = new Date((new Date).getTime() + l * 3600000);
			i = "; expires=" + i.toGMTString()
		};
		if (I != null) {
			c = ";domain=" + I
		};
		document.cookie = O + "=" + escape(o) + i + c
	},
	// Style
	readStyle : function(i, I) {
		if (i.style[I]) {
			return i.style[I]
		} else if (i.currentStyle) {
			return i.currentStyle[I]
		} else if (document.defaultView
				&& document.defaultView.getComputedStyle) {
			var l = document.defaultView.getComputedStyle(i, null);
			return l.getPropertyValue(I)
		} else {
			return null
		}
	}
};

function pload() {
	if (document.getElementById("slide")) {
		var slide = new ScrollPic();
		slide.scrollContId = "slide"; // 内容容器ID
		slide.dotListId = "slide_dot";// 点列表ID
		slide.dotOnClassName = "selected";
		slide.arrLeftId = "sl_left"; // 左箭头ID
		slide.arrRightId = "sl_right";// 右箭头ID
		slide.upright = false;
		slide.speed = 10;
		slide.space = 30;
		slide.frameWidth = 320;
		slide.pageWidth = 320;
		slide.initialize(); // 初始化
	}
}